TWI328684B - Differential measurement probe having retractable double cushioned variable spacing probing tips and providing eos/esd protection - Google Patents

Description

(1) (1) 1328684 IX. Description of the Invention [Technical Field] The present invention relates generally to signal acquisition probes, and more particularly to a reversible double shock absorption variable pitch probe Differential measurement probe for tip and electrical overstress (EOS) and electrostatic discharge (ESD) protection. [Prior Art] A differential time domain reflectometer (TDR) probe is used to emit a stepped pulse on a device under test and to receive a return pulse reflected from the device. The return pulse is coupled to a sampling head that produces a discrete sample of the return signal. Due to the difference in distance between test points on the device under test, it is desirable to provide a differential TDR probe with a variable pitch probe tip. One such differential TDR probe is the A0134332 differential TDR probe manufactured and sold by Inter-Continental Microwave, Inc. of Santa Clara, California. The variable pitch differential TDR probe has individual TDR probes that are mounted to a flat spring using two screws. Each TDR probe has a metal outer casing and one end of the outer casing has a threaded connector for connecting a signal cable. A generally rectangular member extends outwardly from beneath the connector and has a threaded bore for receiving the TDR probe to the screw of the flat spring. Underneath the rectangular member is a circular portion that transforms into a narrow rectangular probe tip member. The probe tip member has a hole that houses an RF pin and a dielectric member. The RF pin is electrically connected to one of the threaded connectors at a central signal connection -4 - (2) 1328684 points. Additional grounded single-pin pins are formed in the narrow rectangular probe tip member. The various apertures allow the grounded single-turn position to be at various different distances from the RF pin. A variable clip is positioned over the TDR probe adjacent to the narrow rectangular member. The adjustment jig has a "U" shaped portion and a flat portion which are secured together by screws. The two U-shaped members are oppositely received to receive the threaded holes of the cap screws which extend through the sides of the jaws into the interior space of the "U". Threaded hole The base of the U-shaped member intersects the pit on the opposite side of the U-shaped member. Each of the threaded holes in the base receives a fixing screw on the cap adjustment screw. Positioning of the RF pins is accomplished by unscrewing the caps and adjusting the cap screws to move each of the pins closer or more apart. The flat springs on which the TDRs are placed cause outward pressure on the probes which abut the adjustment cap screws. The screws of the TDR probe flat springs can also be loosened to allow the probes to rotate the RF needle tip and the grounding single-wound pins are accurately positioned, such as the set screws and the flat spring screws. . Although the above-described variable pitch TDR probes allow for the movement of single tilt pins such as RF, the design of the probes is still lacking, and the RF pins are fixed in the TDR probes so that they do not have an axial direction. motion. This requires that the differential probes are positioned on the same lateral plane to accommodate the probe-shaped apertures to accommodate the pins to be pitch-adjusted to the probe tip and the two sides have the U-shaped configuration A TDR probe attached to the screws in the side is attached to force the holding to the flat motion. When this is done, the needle tip and the point will be taken. For example, the RF pin RF pin is a good -5- (3) 1328684 contact. If the RF tips are not in the same lateral plane, one of the RF pins will be subjected to more axial force to cause the other RF pin to make contact. If this axial force is too large, one or both of the RF pins will be damaged. This requires replacement of the RF pin and the dielectric member. Furthermore, this variable pitch differential probe does not have the ability to protect the sampling head from static voltages that may be present on the device under test. This will cause damage to the sampling circuit in the sampling head. # Using ultra-high speed sampling heads in time domain reflectometers typically requires very low capacitance. This creates a unique problem. The sampling device is more sensitive to electrostatic discharges that are placed on a device under test. The small geometry of the sampling diode in the sampling head typically requires a low breakdown voltage. The low parasitic capacitance at the input of the sampling head indicates that the electrostatic discharge for a given device under test (DUT) will have a higher instantaneous voltage at the input of the sampler due to the reduced charge sharing effect. . Therefore, it is important to neutralize any static charge on the device under test ® before the sample input member is coupled to the device under test. Another variable pitch differential measurement probe is disclosed in U.S. Patent No. 6,704,670. The variable pitch measuring probe has a first and a second substantially cylindrical probe barrel. Each of the probe barrels is constructed of a conductive material that extends partially outside of a probe unit housing. A probe cone nose is attached to each exposed probe barrel. Each of the probe nose cones is generally conical in shape and is made of an insulating material. The longitudinal axis of each probe cone extends from the probe at an offset angle from the longitudinal axis of the probe barrel. A typical cylindrical probe tip extends partially from the end of each -6-(4)(4)1328684 probe cone and is made of a conductive material. A probe cable having an outer shield conductor and a central signal conductor is coupled to each of the probe barrel and the probe tip, and the outer shield conductor is coupled to the probe barrel and the signal conductor Connected to the probe tip. An elastomeric compressible member engages each of the probe barrels and the probe unit housing allows the probe barrels to move in and out of the probe unit housing. The offset longitudinal axes of the probe nose cones and associated probes relative to the longitudinal axis of the probe barrel allow for variable spacing of the probe tips. The force acting on the probe barrel and the probe nose cone assembly is shown graphically in Figure 1. The '670 patent shows that the elastically compressible element as a compression spring follows Hooke's Law FzKiAX, where Κ is a compression spring constant. Figure 1 shows the force applied to the probe nose cone and probe barrel assembly during use, where "F" is the force applied to the probe tip of the probe nose cone, and the Δχ spring compression amount. Assuming that the elastically compressible elements are preloaded, there is an initial force on the assembly represented by force F1. The downward force on the probe unit housing exerts an increasing force on the assemblies, indicated by the diagonal Κ〇. The continued downward force on the probe unit housing causes the resiliently compressible members to be fully compressed or the assemblies to engage a fastener. Continued downward pressure on the probe unit housing transfers force to the assembly, as indicated by the vertical force line. The differential measurement probe described above is used for measurements from a device under test. signal. Therefore, the differential measurement probe has a passive input circuit that reduces the need for EOS/ESD protection. Therefore, these probes do not input the signal to ground to discharge the static voltage on the device under test. (5) (5) 1328684 Another variable-pitch differential measuring probe is the P738〇 differential measuring probe manufactured and sold by Tektronix, Beaverton Towel, Oregon. The P7380 probe has a probe body including an active circuit and a probe tip member coupled to the probe body by two coaxial cables. The probe tip member has different probe contacts that mate with the various probe tips mounted in a tip holder. One of the tip holders has a rotatable probe tip that provides a variable spacing for the probe tips. The probe body and the probe tip member can be positioned in a holding probe adapter housing, which provides easy hand-held detection by the P73 80, as claimed on March 27, 2004. The disclosure of U.S. Patent Application Serial No. 10/856,29. The probe tip member is positioned in a chamber in front of the hand-held probe adapter by extending a portion of the probe tip member through the end of the hand-held probe adapter. A compliant member formed of an elastic material in the chamber abuts against the side surface and the rearward surface of the probe tip member. When the differential probe tips are in contact with a device under test, non-planar changes between the probe tips and the device under test are resolved by the compliant member. The forces acting on the probe tips of the probe tip member are shown graphically in Figure 1. The compliant member is preferably formed of an elastomeric material that is partially compressed by the probe tip member to produce an initial preload condition as indicated by force F1. The downward pressure on the probe tip member exerts an increasing force on one or both of the probe tips due to the compressive nature of the elastomeric material, as indicated by force ι. Continued downward pressure on the probe tip member will completely compress the elastomeric material or the probe tip member engages a fixed stop. The -8-(6) (6) 1328684 on the probe tip unit continues to push down the force to the probe tips as indicated by the vertical force line. As with the variable pitch differential probe described above, the variable pitch differential measurement probe described above is used to measure signals from a device under test. Therefore, the variable pitch differential measuring probe has a passive input circuit that reduces the need for EOS/ESD protection. Therefore, these probes do not input the signal to ground to discharge the static voltage on the device under test. U.S. Patent No. 6,734,689 discloses a measuring probe that provides signal control for an EOS/ESD protection control module. The measurement probe has a spring loaded coaxial probe assembly and a pressure sensor that cooperate to provide a start signal to the control module. The spring loaded coaxial cable assembly and pressure sensor are disposed in a probe housing. The spring loaded coaxial probe assembly has a semi-rigid coaxial cable with a probe tip at one end and a threaded connector at the other end. A flexible coaxial cable is coupled to the threaded connector and to the control module. A compression spring is positioned over the semi-rigid coaxial cable and one end is secured to the semi-rigid coaxial cable and the other end engages the probe housing. The compression spring is preloaded to apply an initial force to the spring loaded coaxial probe assembly, as shown in the graph of Figure 1. Figure 1 shows the force applied to the probe tip of the spring loaded coaxial probe assembly during use, where "F" is the force applied to the probe tip and K! is the spring constant and ΔΧ is the spring The amount of displacement from its equilibrium position. The preload of the compression spring produces an initial force F 1 on the coaxial probe assembly. The pressure sensor has an electrical contact attached to an outer shield conductor of the semi-rigid coaxial cable, and the outer shield guiding system of the semi-rigid coaxial cable is connected to the electrical ground via the flexible coaxial cable (7) ) 1328684 . Another pressure sensor electrical contact is mounted to the probe housing. An electrical conductor electrically couples the pressure sensor to the control module. When the enable signal is not present, the control module provides a ground circuit path for the signal conductor of the measurement probe. When the probe tip is in contact with the device under test, any static charge on the DUT is coupled to the ground via the signal conductor via the control module. This coaxial when the downward pressure is applied to the probe housing. The compression spring according to Hooke's law number) and the continuous downward pressure of the needle housing on the coaxial probe assembly may cause the pressure sensor to transmit the switching circuit in the control module. The contacts on the signal conductor are secured to any of the continuous down-pressure sensors and the coaxial probe assembly on the semi-rigid coaxial electro-acoustic housing. In the pressure sensor and the coaxiality causing the pressure sensor or the coaxial, therefore, a gap differential measuring probe system having a condensable EOS/ESD protection capability is required to be coupled to a signal path of a sampling head. Static voltage. Furthermore, having a collapsible probe should provide a sufficient pressure that the probe assembly will retract to the probe body ΔΧ (where a series of springs often apply an increased pressure. Application to the probe pressure sensor contacts) Producing a contact. The start signal is controlled, and the switch circuit removes one of the ground connections. Since the pressure sensor is connected to the probe housing, the force is transferred to the probe. This pressure, as shown by the vertical force line in Figure 1. The excessive force on the probe assembly may damage the probe assembly. The double-shock variable-variable probe tip and the split-type measuring probe. Between the tip of the needle, the probe tip of the differential measuring probe is previously discharged on a device to be tested. The difference between the double-shock variable-pitch probe tip has been applied to the probe to give -10- ( 8) (8) 1328684 User to prevent damage to the probe. SUMMARY OF THE INVENTION [The present invention is a differential measuring probe having first and second coaxial probe assemblies' and each coaxial The probe assembly has a probe tip. The coaxial probe assemblies are received In a housing, the probe tips extend from one end of the housing. In a preferred embodiment, each of the first and second coaxial probe assemblies is formed by a half rigid coaxial cable And the semi-rigid coaxial cable has a probe tip at one end and a threaded connector at the other end. The probe tip portion of the semi-rigid coaxial cable has a curved portion at the probe tip Transforming the straight portions so that the probe tips of the semi-rigid coaxial cables are angled toward each other. The first compressible member is disposed in the housing and one of the first compressible members is engaged The first coaxial probe assembly and applying a first preload compressive force to the first coaxial probe assembly and a first applied by the housing relative to the axial movement of the first coaxial probe assembly Adding a compressive force. Another first compressible member engages the second coaxial probe assembly and applies a first preloading compressive force to the second coaxial probe assembly and a housing relative to the first Axial probe assembly axial The first applied compressive force is applied. In the preferred embodiment, each of the first compressible elements is positioned in each of the first and second coaxial probe assemblies. a compression spring on one of the semi-rigid coaxial cables. One end of the compression spring is fixedly positioned to the semi-rigid coaxial cables, and the other end engages the housing, and the compression springs are compressed therein And a semi-rigid relationship between the fixed position on the -11 - (9) 1328684 shaft cable and the outer casing to produce a preload compressive force. The second compressible member is disposed in the outer casing and one of the contracting members Applying a second preload compressive force to the first coaxial probe after applying a compressive force on the first coaxial probe assembly to the first assembly and by moving the housing relative to the first coaxial probe assembly One of the second increases the compressive force. The other first member applies the first increase on the second coaxial probe assembly to apply a second preloading compressive force to the second coaxial probe to the outer casing relative to the first One of the further axes of the two-coaxial probe assembly Increasing the compression force. The first and second pressure sensors are disposed in the housing with an activation signal of the housing relative to the axial direction of the first and second coaxial probe assemblies. A second portion associated with each of the first partial shells of each of the respective coaxial probe assemblies of the first and second pressure sensors. The first and second pressure sensing have a first guide disposed on an outer shield conductor of the semi-rigid coaxial cable of the first and second coaxial probe assemblies, and a second one disposed in the outer casing Conductive contacts. The first one is electrically intimately connected to the semi-rigid coaxial electrical conduction conductors, and the other first electrically conductive contact is electrically insulated from the other semi-rigid outer shield conductor. When the first and second pressure sensors chew the second and second pressure sensing second conductive contacts, the first and second pressure sensors generate the first and second second The first increasing coaxial probe can be pressed further to the second axis of the compressible element compressive force and then by moving to the motion corresponding to the motion, the transmitter has one and one and each of the outer devices One of the electrical contacts and the externally-screened coaxial cable pressure sensor of the conductive contacts is a logical "-12-(10) (10) 1328684 and (AND)" function. At least one first adjustment mechanism is disposed in the housing and mechanically coupled to one of the first and second coaxial probe assemblies to change the first and second coaxial probe assemblies The probe tip spacing of the probe tips of the semi-rigid coaxial cable. The outer casing preferably has first and second members, and at least one of the members has a passageway formed therein. The first and second members are joined together to form an internal chamber for receiving the first and second coaxial probe assemblies, the first compressible members, the second compressible members, and at least the first Adjusting the first and second pressure sensor portions of the mechanism. In one embodiment of the differential measurement probe, each of the first conductive contacts of the first and second pressure sensors has a first coaxial probe assembly disposed adjacent to the first coaxial probe assembly. The holding tips of the probe tips of the semi-rigid coaxial cables. The holding block of the first pressure sensor has a curved groove disposed between the opposite straight portions to receive the curved portion of the semi-rigid coaxial cable of the first coaxial probe assembly, and the holding The block is used as the first conductive contact of the first pressure sensor. The retaining block of the second pressure sensor is disposed adjacent to the probe tip of the semi-rigid coaxial cable of the second coaxial probe assembly. The retaining block of the second pressure sensor has a curved recess disposed between the opposite straight portions to receive a curved portion of the semi-rigid coaxial cable of the second coaxial probe assembly. A conductive member is disposed adjacent and electrically insulated from one of the second pressure sensor holding blocks. In addition, one of the second conductive contacts of the first and second pressure sensors has a common conductive contact for the common conductive contact via the 13th - (11) (11) 1328684 One of the first conductive contacts of the first and second pressure sensors electrically connects the table-conductive contacts together. In this embodiment, each of the second compressible elements is a compression spring disposed in a hole in a conductive outer casing, the conductive outer casing having a movable electricity secured in the hole contact. Compression springs of the second compressible members are compressed between the electrically conductive outer casings and the movable electrical contacts to produce the second preloading compressive forces. Each of the electrically conductive outer casings and the movable electrical contacts forms one of the second electrically conductive contacts of the first and second pressure sensors. The adjustment mechanism has a carrier that includes a threaded bore therein. The carrier receives one of the first and second retention blocks of the probe tips of the semi-rigid coaxial cables disposed adjacent to the first and second coaxial probe assemblies. A screw having a screw head attached to a threaded shank engages a threaded bore in the carrier. The screw head is received and captured in a recess in the outer surface of the outer casing, and the threaded shank extends through one of the outer casings to engage the carrier. In the preferred embodiment, the carrier has a U-shaped member having a base and side walls, and the retaining block is tightly received in the U-shaped member. At least one of the probe tips of the first and second coaxial probe assemblies is moved relative to the other probe tip to change the probes by rotating the screws in the adjustment member The spacing between the tips. In the preferred embodiment, each of the first and second coaxial probe assemblies further has an attachment plate disposed on the semi-rigid coaxial cable adjacent the threaded connector. Each attachment plate is secured to an anti-rotation block that is positioned in the housing. A bracket having a top panel and associated side walls is secured to one of the attachment panels. At least one first electrical connector receptacle is mounted to the bracket - 14 - (12) 1328684 and is electrically coupled to one of the first and second embosses by an electrical conductor. A differential measuring probe is preferably coupled to the at least one first electrical overstress and electrostatic discharge protection module via the first and first axis cables. The differential measuring probe transmits a start signal to the electrical force and electrostatic discharge protection control module to electrically couple the probe tip such as the differential measuring probe to the input circuit of the measuring test instrument. One of the second conductive contacts of the second pressure sensor is coupled to the electrical overstress and electrostatic discharge protection control module via the electrical conductor. After the first conductive contacts of the first two pressure sensors engage the first conductive contacts of the first and second sensing benefits, the first and second coaxial assemblies The probe tip is coupled to the electrical ground via the electrical overstress and the ESD protection module. When the electrical overstress and the electrostatic protection control module receive the first conductive contacts corresponding to the first and second pressure sensors, the first electrical contacts of the first and second pressure sensors are engaged The starter signals transmitted by the first and second pressure sensors are electrically connected to the input circuits of the measurement test instrument. Preferably, the second conductive contacts of the first and second pressure sensors are in contact with the electrical overstress and the ESD protection control module, preferably having first and second insulated line portions. The first insulated wire partially contacts the second conductive of the first and second pressure sensors to an electrical contact of one of the electrical connectors mounted on the differential measuring probe. The second insulated wire is electrically coupled to a first electrical plug contact to an electrical contact of the second electrical plug, and the first electrical plug has the same sense of protection. The coupler and the first pressure probe control the discharge of the two guides when the socket head of one of the conductors is coupled with the electrical connector socket of the -15-(13) 1328684 mounted on the differential measuring probe. And the second electrical plug is mated with an electrical connector socket having an electrical contact mounted in the electrical overstress and electrostatic discharge control module. The differential measuring probe can also be coupled to the first and second electrical and electrostatic discharge protection control modules. In this embodiment, the first coaxial cable of the differential probe is coupled to the first electrical overstress and discharge protection control module, and the second coaxial cable is coupled to the φth overstress And electrostatic discharge protection control module. The differential measurement probe transmits the start signal to the two electrical overstress and ESD protection modules. The electrical conductor is then formed by a first insulated wire portion electrically coupled to one of the second contacts of the first and second pressure sensors to be mounted thereon Different electrical contacts of the first and second electrical connector sockets of the differential measuring probe. The second and third line portions electrically couple the enable signal to the first and second electrical force and electrostatic discharge protection control modules. The second and third insulated wire portions #1 have first and second electrical plugs, and the first and second electrical plugs have an electrical contact. The electrical connection of the first electrical plug of the second insulated wire is matched with the point of the first electrical connector socket mounted on the differential measuring probe, and the electrical contact of the second electrical plug of the second insulated wire is The electrical contacts of the connector socket are matched in the first electrical overstress and the electrostatic discharge protection control module. The first electrical contact of the third insulated wire is matched with the electrical contact of the second electrical socket mounted on the differential measuring probe, and the second electrical plug contact of the third insulated wire And each of the electrical plugs that are installed in the second electrical overstress and the electrostatic discharge protection of the first protective over-the-counter electrostatic second-electrode to control the insulation on the first conductive Electrical control of the connector - 16 - (15) (15) 1328684 The connector 3 2 is also placed in the control modules 1 2, 1 3 . An optional visual indicator 34, such as an LED, can be secured to the control modules 1 2, 1 3 ' to indicate one of the respective probe tips of the variable tip pitch differential measurement probe 1 When is coupled to the sampling head 18. The coaxial input terminals 26 of the control modules 12, 13 are coupled to one ends of the respective coaxial cables 36, 37, and the other ends of the coaxial cables are coupled to the variable tip pitch differential measuring probes. 10. The coaxial output terminals 28 are coupled to the input terminals 22, 23 of the sampling head 8 by respective coaxial cables 24, 25. The 50 ohm terminal connector 38 is secured to the coaxial terminal machine. Terminal 30. The respective conductive plug connectors 4, 41 are plugged into the input connector 32. The electrical contacts 42, 43 of the plug connectors 40'41 are electrically coupled to the electrical conductors 44, 45 having the second plug connectors 46, 47 at the other end. The second plug connectors 46, 47 are plugged into the plug sockets 48, 49 mounted on the variable tip pitch differential measuring probe 1''. The variable tip pitch differential measuring probe 1 is used to detect circuit traces 50 and devices mounted on a circuit board 52 of a device under test 54. The circuit board 52 displays two sets of circuit traces 50, one of which is configured with conventional G-S-G-S-G contacts, and the traces 50 extend outwardly to the contacts. Another set of traces 50 is not structured into a conventional contact configuration. The differential measuring probe 10 having a retractable double shock absorbing variable pitch probe tip has the ability to detect two sets of traces 50 by varying the distance between the probe tips. Referring now to Figure 4, there is shown a probe tip having a retractable double damper variable pitch and having a start signal transmitted to the EOS/ESD -18-(16) (16) 1328684 guard control mode An exploded view of the outer casing 100 of the first embodiment of the differential measuring probe 1 of the group 1 2, 1 3 capability. The outer casing 1 is preferably elongate and has a generally rectangular cross-sectional shape and is formed from the first and second members 102,104. The outer casing 1 is formed of an insulating material such as ABS plastic, polycarbonate or the like. At least one of the outer casing members 1 2 has first and second passages 106, 107 exposed at the front end of the outer casing member 102. Preferably, the channels 106, 107 are formed parallel to one another and parallel to the longitudinal axis of the outer casing member 102. Each channel 106, 107 has a respective recess 112, 113 and 114, 115 formed therein. Each of the recesses 112, 113, 114 and 115 has a rear end wall 116, 117, 118 and 119. A recess 120 is formed between the end wall 116 extending from the recess 112 to a transverse passage recess 121 formed in the outer casing member 102 between the passages 106, 107. Two parallel grooves 122, 123 are formed in the channel 107, and a groove 122 intersects the lateral channel groove 121. A longitudinal groove 124 is formed in the passage 107 and extends from the groove 123 to the recess 115 in the passage 1?. The rear end walls 1 19 and 19 are the surfaces of the channel partitions 125, 126 which separate the passages 106, 107 from a single open recess 127 that is rearwardly of the face of the back end portion 110 of the outer casing member 102. Each of the channel partition walls 125, 126 has a notch 128, 129 formed at the top. A groove 130 is formed in the passage partition 126 that intersects the recess 115. A hole (not shown) is formed in the recess 130 extending to the outer surface of the outer casing member 102" - a substantially continuous projection 131 extending outward from one side of the outer casing member 102. A notch 132 is formed in the wall of the projection that intersects the notch 112 in the passage 106 -19-(17) (17) 1328684. A hole 133 is formed in the protrusion 131 from the recess 132 to the outer side surface of the outer casing member 1〇2. When the first and second outer casing members 102 and 104 are attached to each other, the channels 106' 107 and the notches 112, 113' 114 and 115 form a single inner chamber 134 in the outer casing 100. . Although the housing 100 described above has a channel 106, 107 and recesses 112, 113, 114, 115 and 127 in a housing member 102, the housing 1 can also be in both housing members 102, 104. Channels and recesses are formed. When the outer casing members 102, 1〇4 are attached to each other, the passages and recesses constitute the inner chamber 134 and the recess 127». Referring now to FIG. 5, First and second coaxial probe assemblies 140, 141, first and second pressure sensors 142, 143, first and second compression elements 第一 44, 145 of the first coaxial probe assembly 140, and A partially exploded perspective view of the first and second compression elements 146, 147 of the second coaxial probe assembly 141. Each of the coaxial probe assemblies 140, 141 has a semi-rigid coaxial cable 148 having a central signal conductor 149 and an outer shield conductor 150. The center signal conductor 149 extends outwardly beyond the outer shield conductor 150 to form a probe tip 151. The semi-rigid coaxial cable 148 has a curved portion 152 at the probe tip portion 151 that transitions into a straight portion at the probe tip 151 and toward a coaxial thread attached to the other end of the semi-rigid coaxial cable 148. The connector 1S3 extends. The screw portion of the coaxial threaded connector 153 is coupled to the outer shield conductor 150, and the center signal conductor 149 is coupled to a center conductor disposed axially in the coaxial threaded connector 153. An attached plate -20- (18) (18)

1328684 154 is attached to the outer body 150 adjacent to the coaxial threaded connector 153. The attachment plate 154 is preferably rectangular in shape and has an opening 155 for receiving a screw. An anti-rotation block 156, 157 is located away from each of the attachment plates on the side of the coaxial threaded connector 153. Each anti-rotation block 156, 157 has a channel 158 for receiving the semi-rigid H8. . The anti-rotation blocks 156, 157 have holes that receive screws that extend through the opening 1555 of the attachment plate 154, and the anti-rotation blocks 156, 157 are secured to the attachment plate 154. The first pressure sensor 142 has a first conductive contact 180 positioned on the semi-rigid cable 148. The conductive contact 18 〇 has a rectangular holding block 181 having a curved concave shape as clearly shown in FIG. A curved portion 152 of the half shaft cable H8 of the first coaxial probe assembly 140 is disposed in the recess 182 of the holding block 181. The curved recess 182 of the curved portion 1 of the semi-rigid coaxial cable 148 preferably has a length of 1. The central line half of 1吋 ranges from 10 to 45 degrees of total radius of curvature, and the radius of curvature is relatively large. The end portion of the curved groove 182 in the holding block 181 and the curved portion 152 of the coaxial coaxial cable M8 are converted into a straight portion 184, and the probe tip portion 151 of the semi-rigid coaxial cable 148 is extended in the tangential direction. To the semi-rigid coaxial cable 148 portion 152. When the curved and long straight portions 183, 184 of the semi-rigid coaxial cable 152 are positioned to bend the curved recess 182 of the retaining block 181 into a curved shape, the semi-rigid coaxial cable 148 has a tendency to have a certain angle. This property is used to guide the semi-rigid coaxial cable shield in the 15 4° axis cable is threaded to make the coaxial electric ground slot 182 rigidly curved 52 and concave diameter and preferably 22 semi-hard 183 and the bending of the shaft; divided into 152. When 'rebound 148" - 21 - (19) 1328684 is secured in the curved recess 182 of the retaining block 181 and electrical contact is made between the semi-rigid cable 148 and the retaining block 181. The curved and long straight portions 152, 1 184 of the outer shield conductor 150 of the semi-rigid cable 148 are pressed against the sides of the curved recess 182 to provide the semi-rigidity. Cable 148 is secured in the retention block 181. The first conductive contact 180 holding block 181 is preferably made of a conductive material such as gold plated brass or the like. The degree of susceptance of the retaining block 181 substantially conforms to the height of the recess 112 formed in the shell member 102 and is wide enough to make contact with one of the second conductive contacts 185 of the pressure sensor 142. The second conductive contact 185 of the pressure sensor 142 is disposed within a recess 186 formed in the outer casing member 102, as shown in the perspective view of FIG. The groove 186 is aligned and parallel to 106 of the outer casing members 1〇2. The second conductive contact 185 of the first pressure sensor 142 has a movable electrical contact 187, which is disposed in a hole of the conductive outer casing 188, and the compression element 145 of the first coaxial probe assembly 140. It is also disposed in the hole of the electrical housing 188. The movable electrical contact 187 extends to the recess ′ to make contact with the first conductive contact 180 of the first pressure sensor 142. The second pressure sensor 143 has a first conductive contact 190 positioned in a rectangular holding block 191 having a curved recess 192 as shown in FIG. The curved portion 152 of the semi-rigid cable 148 of the second coaxial probe assembly 141 is disposed in the curved slot 192 of the holding block 191. The curved portion 152 of the semi-rigid coaxial cable 148 has a concave curved groove 192 preferably having a 1" 中央 central line radius axis electrical axis 83' axial solid copper, the outer first first in the There is a channel in Chuxian. The guide 112 generates electricity, and the coaxial curvature and the -22-(20) 1328684 range from 10 to 45 degrees, and the radius of curvature is relatively high. The end of the curved recess 192 in the holding block 191 and the curved portion 152 of the coaxial coaxial cable 148 are converted into a straight portion 194, and the probe tip portion 151 of the semi-rigid coaxial cable 148 is extended in the tangential direction. To the semi-rigid coaxial cable 148 portion 1 52. The curved and long straight portion 152 194 of the semi-rigid coaxial cable 1M is positioned in the curved recess 192 of the holding block 191. The semi-rigid coaxial cable 148 has a tendency to rebound when it is bent. This property is used to secure the semi-rigid coaxial cable 148 in the curved recess 192 of the block 191 and to make electrical contact between the semi-rigid coaxial power and the retaining block 191. The semi-rigid coaxial outer shield conductor 150 has curved and long straight portions 152, 193 that abut against the sides of the curved recess 192 to secure the semi-rigid coaxial in the retaining block 191. The rectangular holding block 191 is formed of a material such as brass, embossing or the like to provide a continuous substrate surface for the guide 190. An electrically insulating material 195 is provided with electrical contacts 190 and the holding block 191 to electrically isolate the contacts 19A from the pin assembly 141. The first conductive contact 190 is preferably made of a conductive material such as gold plated copper 'brass or the like. The height of the 191 substantially conforms to the degree formed in the outer casing member and is wide enough to form the first conductive contact 19 and the first conductive contact 196 of the pressure sensor M3 to form a contact pressure. The second conductive contact 196 of the sensor 143 is made up of two of the 22 semi-hard 193 and the bending of the shaft, 193, bent at an angle to the cable 148 148 194 pressure: cable 148 hard The electrical contact of the material is placed on the guiding coaxial ground by a notch of the holding block and the first. The first arrangement is formed by conductive elements 197, 198 formed in the grooves 199 and 200 of the outer casing member 102 at -23-(21)(21)1328684. The grooves 199, 200 are aligned parallel to the passage 107 in the outer casing member 102. The conductive elements 197, 198 of the second conductive contact 196 of the second pressure sensor 143 have first and second movable electrical contacts 201, 202 disposed in respective conductive housings 203, 2〇4 In the hole. A second compression element 147 of the second coaxial probe assembly 141 is also disposed in the aperture of the conductive housing 203, 204. The movable electrical contact 20 1 , 202 extends into the recess 1 14 to make electrical contact with the first conductive contact of the second pressure sensor 1 43 . An insulated wire 206 is disposed in the lateral channel groove 121, and electrically couples the conductive outer casing 188 of the second electrical contact 185 of the first pressure sensor M2 to the second conductive contact 196. Conductive outer casing 203 of conductive element 197. The insulated wire 206 and the conductive element 197 form a common electrical component for coupling the enable signal to the first and the first via the first conductive contact 1 800, 190 An insulated wire 207 between the second conductive contacts 185, 196 of the two pressure sensors 142, 143 electrically couples the conductive outer casing 204 of the conductive element 198 to the differential measuring probe 1 Plug and socket 48, 49. Alternatively, if the first conductive contact 180 of the first pressure sensor 142 is electrically insulated from the semi-rigid coaxial cable 148 of the first coaxial probe assembly 140 and the first of the second pressure sensors 143 The conductive contact 190 is electrically coupled to the semi-rigid coaxial cable 148 ′ of the second coaxial probe assembly 141. The insulated wire 2 〇 6 can also be coupled to the first pressure sensor 142 . A conductive contact 18 〇 electrically conductive housing ι88. In the preferred embodiment, the second conductive contact of the first pressure sensor 142 is electrically conductive - 24 - (22) (22) 1328684 point 185 and the second electrical contact 196 of the second pressure sensor 143 is electrically conductive. Elements 197, 198 are single-wound pins. Referring back to FIG. 5, each of the first compression elements 144, 146 of the first and second coaxial probe assemblies 140, 141 is a compression spring 208 that is positioned in the coaxial probe assembly 140. 141 on the semi-rigid coaxial cable 148. One end of the compression spring 20 8 is preferably held in position on the semi-rigid coaxial cable 148 by a compression spring retaining member 209 secured to the outer shield conductor 150 of the semi-rigid coaxial cable 148. Each of the compression spring retaining members 209 is preferably a collar that is looped over the semi-rigid coaxial cable 148. The collars are formed of a sturdy material such as metal, ABS plastic, and the like. The collars are placed on the semi-rigid coaxial cable 148 and secured to the semi-rigid coaxial cable 148 by an adhesive such as epoxy, Locktite® or the like. The other ends of the compression springs 208 are free to move along the semi-rigid coaxial cable 148. A pressure plate 210 having a washer pattern is preferably positioned adjacent each of the free ends of the compression spring 208 to engage the recess U3 of the passages ι, 107, and the trailing edge end wall Η 7 of the Η 5 , 1丨9. The second compression elements 145, 147 are disposed in the holes of the conductive housings 188, 203, 2〇4 and are captured between the closed ends of the holes and the movable electrical contacts 187, 201, 202. compressed spring. The compression springs are partially compressed in the electrically conductive outer casings 188, 203, 204 by the movable electrical contacts 187, 201' 202. A partially compressed spring in the electrically conductive outer casing 188 produces a preloading compressive force F2' on the movable electrical contact 187 as shown in the graph of Fig. 9A. An increased axial force is required at the movable electrical contact 187-25-(23) 1328684 to move the electrical contact 187 into the housing 18' as indicated by the oblique line κ2. The force applied to this point is in accordance with Hooke's law F = K2AX, where the Κ2 spring is often the amount of displacement of the spring from its original equilibrium position. Each of the conductive 203, 204 partially compressed springs will produce a preloading force ρ3 on the movable electrical connection 202, as required by each of the movable electrical contacts 201, 202 of the diagram of FIG. A force is added to move the electrical contacts 201, 202 out of the conductivity, 204, as indicated by the oblique line κ3. The second coaxial probe assembly is added by the preloading force applied to the movable electrical contact 2〇2 and the increased axial force added by the compression springs in the conductive electrodes 203, 204 The total preloading force and the increased axial force of the second compression element 147 on 141 will be substantially equal to the preload applied by the second compression element 丨45 on the first needle assembly 140 and increased. Axial force. The coaxial probe assemblies 140, 141 are positioned in the housing configuration such that the probe tip 151 extends out of the housing member 102 1〇8 and the coaxial threaded connector 153 extends from the other end of the housing member 110. The compression bombs of the first compression elements 144, 146 are positioned in respective recesses 115 of the first and second passages 106, 107 ' and the compression springs 20 8 are pressurized and abut against the H3, 115 is on the trailing edge end walls 117, 119. The first conductive contact 18 〇 of the first pressure 142 and the second pressure sensor 143 conductive contact 190 are positioned in the respective recesses 1 丨 2, 114. 2 01 shows. The axial shell 203 of the outer casing 201 is such that the spring 208 113 of the end portion 102 of the compressive force i 012 is applied, and the first of the notch sensors. Attachment -26-(24) 1328684 to the anti-rotation blocks 156, 157 of the coaxial probe assemblies 140, 141 are in the recess 127. The initial compression of the compression springs 208 exerts a preload pressure Fi on each of the coaxial probe assemblies 丨4, M1, as shown in the graph of Figure 9A. An increased force is required to move the free end of the retracting spring 208, as indicated by the slash K, wherein the spring constant of the 1 yoke spring 208 conforms to Hooke's law F = K2AX, ΔX is the original balance of the spring The amount of displacement of the position. • The coaxial probe assemblies 140, 141 have an initial force applied thereto by the preload force of the compression bomb, as indicated by F i in Figure 9B. By the probe tips 151 being positioned on the tested 54, the downward movement of the probe housing 1 〇〇 relative to the coaxial probe assembly 14 会 causes the notches 113, 115 to follow The end wall 117 compresses the compression springs 20 8, as indicated by the diagonal line K. A combination of the increased force required to apply the spring constants of the compression springs 208 to the shaft probe assemblies 140, 141 and correspondingly applied to the probe tips 151. The lower movement causes the conductive contact 185 of the first pressure sense 142 to move toward the first electrical contact 180 of the first pressure sensor 142. Similarly, the movable portion 2〇1, 2〇2 of the second conductive contact 196 of the second pressure sensor 143 is moved downwardly toward the second pressure sensor 143. The first conductive 190 moves. When the first and second guiding points 180, 185 of the first pressure sensor 142 are in contact, an activation signal is transmitted to the conductive element 197 of the conductive contact 196 of the second sensor 143. When the first positioning force is equal to the pressure device 141 119, the force device 141 119 is the same force as the detector is guided to make electrical connection point electrical connection pressure two pressure -27- (25) 1328684 force sensor When the first conductive contact 1 90 of 1 43 is in contact with the movable electrical points 201, 202 of the conductive elements 197, 198 of the second conductive contact 196 of the second pressure sensing 143, the activation signal is via the insulated wire 207. The activation signal is then transmitted to the plug sockets 48, 49 via the second pressure sensor 143 and the activation signal is then coupled to the control group 12, 13 via the electrical conductors 44, 45. At the same time, the compression spring of the second pressure element 145 in the conductive housing 188 generates a preload compression force F2 that is pressed against the conductive contact 180 of the pressure sensor 142. The preload compressive force will immediately produce an increased force on the coaxial probe assembly 140 as indicated by the vertical force line F2 extending from the Κι line in Figure 9B. Similarly, a compression spring of the second compression element 147 in the electrically conductive outer casing 203, 204 produces a preloaded compressive force F2 that is pressed against the first electrically conductive joint 190 of the pressure sensor 143. As previously mentioned, the combined force of the compression spring in the conductive housings 20 3, 204 is substantially equal to the pressure F2 and the spring constant K of the compression spring of the second compression element 145 in the electrically conductive housing 188! . The preload compressive force F2 produces an immediate increase in force on the coaxial probe 141, such as the vertical force line F2 extending from K in Figure 9B. The increased force on the coaxial probe assemblies 140, 141 will give the user a distinct tactile feel for each of the coaxial probe assemblies 14 〇 141. The user will feel the need to apply a greater downward force on the probe housing 100 to move the probe housing relative to the coaxial probes 140, 141. Furthermore, due to the additive nature of the spring constants of the first and second contracting elements, an increased downward amount is required to move the probe to the jaws relative to the coaxial probe assemblies 140, 141. The first F2 is shunted at each point to make the needle into a pressure outside the -28- (26) 1328684 shell 100. On the probe housing 100, the first conductive contacts 180, 190 of the sensor 142, 143 are continued to the rear end walls 116, 118. At the probe: any continued downward pressure will transmit force directly to the 140, Ml, as indicated by the vertical force line f4, without spring cancellation. The "AND" gates of the first and second pressure sensors 142, 143 are used to transmit the enable signals 48, 49. If the first and 180 and 185 of the first pressure sensor 142 are engaged before the electrical contacts 190 and 196 of the second pressure sensor 143, the activation signal will be the plug sockets 48, 49. Similarly, if the second pressure first and second conductive contacts 190 and 196 are prior to the first and second conductive contacts 180 and 185 of the 142, the signal will not be transmitted to the plug socket 48. 49. Only the first and second conductive contacts of the sensors 142, 143 are transmitted to the plug receptacles 48, compared to the conventional differences with the movable probe tip or housing, using the first The compression elements 144, 146 and the second pressure 1 4 7 can be used to lift the components of the coaxial probe assembly 140, 141 by the second compression element I45, 147 for The increase in movement of the coaxial probe assemblies 140, 141 provides a tactile sense that does not give a user sufficient pressure has been applied to the coaxial probe assembly 140, the amount will cause pressure against the concave housing The coaxial probe assembly on the 1000 is subjected to the pressure sensing such that the first and second guides of the second conductive contact of the plug socket are not transmitted to the sensor 1 4 3 If the device is engaged, the start-up is to measure the deep-reduction element 14 5 in the case of the two-pressure engagement, for reinforcement protection. The force required for the probe housing is known to the user '141. Furthermore, -29-(27)(27)1328684 the second compression elements 145, 147 provide a pressure safety zone in which additional downward force can be applied to the probe housing 100 without There is a risk of damage to the coaxial probe assemblies 140, 141. This pressure safety zone is not provided in the probes of the prior art. Referring again to Figure 5, the adjustment mechanism 210 for varying the distance between the probe tips 115 has a carrier 211 that closely receives the retention block 181 of the first coaxial probe assembly H1. The carrier 211 is preferably a U-shaped member having a base portion 212 and sidewalls 2 1 3 and 2 1 4 extending from both ends of the base portion 212. The sidewall 2 1 3 has a threaded hole formed therein. A threaded cap screw 2 1 5 having a cap head 2 16 and a threaded shank 2 1 7 is received. The threaded cap screw 2 15 is inserted into the hole 133 of the outer casing member protrusion 13 1 , and the threaded shank 217 extends into the recess 1 1 2 of the passage 106 and is screwed to the carrier 2 1 1 in. The cap head 216 of the cap screw 2 15 is placed in a recess formed in the outer surface of the outer casing member 1G2. A cap plate 218 fits over the recess and is retained in position by a screw 219 that is threaded into the outer casing member 102. The cap cover 218 closely captures the cap head 216 between the outer casing member 1〇2 and the cap cover 218 such that the cap head 216 does not have axial movement in the recess. The retaining block 181 is frictionally fitted between the side walls 213 and 214 of the carrier 211 such that the retaining block 181 does not have lateral clearance in the carrier 211. The carrier 211 is positioned in the recess U2 of the passage 106 of the outer casing member 1 2 and transversely passes over the recess corresponding to the rotation of the cap screw 215. Rotating the cap screw 215 clockwise causes the carrier 211 to move outwardly toward the outer casing by the -30-(28) (28) 1328684 outer casing member 102 to generate pressure on the bottom surface of the cap head 216. The hour hand rotation of the cap screw 215 causes the carrier to move inwardly toward the center of the outer casing member 102 by the cap cover 218 to create pressure on the top of the cap head 216. The carrier 211 can be retracted into the recess ι 32 formed in the protruding wall until the holding block 181 abuts against the outer side wall of the recess 112. The carrier 211 can extend over the recess 112 until the retaining block 181 abuts against the inner sidewall of the recess 112 and a portion of the carrier moves into the partition wall 211 formed between the channels 106 and 107. The groove 220 in the middle. Referring now to Figure 10, there is shown a retractable dual shock absorbing variable pitch probe tip for transmitting a start signal to first and second electrical overstress (ESS) and electrostatic discharge (ESD) protection control modes. The assembled differential measuring probe 10 of the group 12, 13 is completed. The first and second outer casing members 102, 104 are secured together to capture the coaxial probe assembly 丨40, 14 丨 in the outer casing 100 and extend the probe tips 151 out of the The ends 108 extend and extend the coaxial threaded connectors 153 out of the ends 110. The probe tips 151 are angularly oriented toward one another such that by using the adjustment mechanism 210 to move one of the probe tips 151 relative to the other, the probe tip spacing can be from zero. 2 mm changed to 4. 2 mm. In order to achieve 0. The center signal conductor 149 and the outer shield conductor 15 of the probe tip 151 made of the semi-rigid coaxial cable i 48 are cut into bevels, as shown in detail in Fig. 11. One of the probe tips 151 of the differential measuring probe 10 having a retractable double shock absorbing variable pitch probe tip -31 - (29) (29) 1328684 is shown in the figure. The center signal conductor 149 of the probe tip 151 is truncated to a slope at a nominal angle of 36 degrees with respect to the surface 230 of the semi-rigid coaxial cable 148. A second bevel is formed at the detection point 232 of the probe tip 151 with respect to the central signal conductor 14. One of the slopes ranges from 45 degrees to 70 degrees, and the second slope has an additional angle of 63 degrees. This causes the sharp point to be removed at the acute angle 23 2 of the central signal conductor 149. The flat surface produced by the second slope has a zero from 0. 002 to 0. The size range of 004吋, and the rated size is 0·003吋. The use of the second bevel on the central signal conductor 149 increases the intensity of the detection point 23 2 . The outer shield conductor 150 is also cut out of the ramp 2 3 4 to allow the detection points 23 2 of the central signal conductor 149 to be at 0. Within 2 mm range. The diagonal mask on the outer shield conductor 150 has a nominal angle of 15 degrees. The bevel angle can also vary depending on the diameter of the semi-rigid coaxial cable 148 and the angle of the probe tip 151 relative to the end face of the probe 1 turns. The probe tips 151 are oriented such that the ramps 234 of the outer shield conductors 150 face each other. - The bracket 222 is positioned on the end 110 of the outer casing 1 , which is attached to one of the anti-rotation blocks 1 5 6 , 1 5 7 by means of screws. Plug receptacles 48, 49 are mounted on the bracket, and each plug receptacle 48, 49 has an electrical contact 22 5, 226» the second plug connectors 46, 47 of the electrical conductors 44, 45 each have an electrical Contacts 223, 224 are electrically coupled to the electrical contacts 225, 226 of the plug receptacles 48, 49 when mated. The insulated wire 207 electrically coupled to the second conductive contact -32- (30) 1328684 196 of the second pressure sensor 143 is electrically coupled to the plug socket 48, 49. Point 225, 226, to couple the start signal to the control module, 1 3, please refer to FIG. 12, which shows a schematic diagram of the control circuit 240 in the control modules 12 and 13. Every control module! The 2 ' 1 3 system acts in the same manner and provides EOS/ESD protection to one of the first and second input channels of the sample 'head 18 of the measurement tester 1 。. Each of the control modules 1 2 and 13 receives an activation signal from the differential measurement probe 10 via a conductive input connector 32 connected to the other electrical contacts 42 , 43 of the plug connector 40 , 4 1 , wherein The plug connectors are connected to the electrical conductors 44, 45. The enable signal from the differential measurement probe is coupled to the control terminal of a high input impedance transconductance device 244 via resistor 242. In the preferred embodiment, the high-impedance transconductance device 244 is a p-channel MOS field effect transistor, such as that manufactured by Tektronix and sold under the part number 1 5 1 - 1 1 20-00. Transistor. Alternatively, the high input impedance transconductance device 244 can be a CMOS logic gate of a power supply circuit. A bias resistor 246 is coupled between the control terminal of the high input impedance transconductance device 244 and a voltage supply source. The voltage supply is also supplied to the current output of the high input impedance transconductance device 244 via a power supply resistor 248 and a charging power 247. The output of the high input impedance transconductance device 244 is coupled via an RF relay switch 250. The relay switch contacts 252 and 254 are each coupled to the signal body of the coaxial output terminal 28 and a coaxial terminal terminal 30. 256 and 258. The armature contacts 260 are coupled to the coaxial input terminals 12, and the pins of the pins are responsive to the signal conductors 262 of the capacitors -33 - 26 (31) (31) 1328684. A shunt diode 264 is coupled in parallel with the RF relay switch 250. A series resistor 266 and a light emitting diode for use as the optional visual indicator 34 can also be coupled in parallel with the RF relay switch 250. The operation of the differential measuring probe 1 将 will be described with a -P·channel MOSFET as the high input impedance transconductance device 244. The spring loaded coaxial probe assembly 14A, M1 of the differential measuring probe 10 is coupled to one of the respective coaxial input terminals 26 of the control modules 12 and 13 via coaxial cables 36 and 37. The center signal conductors 149 of the semi-rigid coaxial cables 148 of the first and second coaxial probe assemblies 140, 141 are coupled to the signal conductors 262 of the coaxial input terminals 26 of the control modules 12 and 13. The semi-rigid, outer shield conductors 150 of the coaxial cable 148 are electrically coupled to the ground via the outer shield conductors of the coaxial cables 36, 37 and the coaxial input terminals 26. The first and second pressure sensors 142 , 143 are coupled to the p-channel MOSFETs 244 via the electrical conductors 44 , 45 of the input connectors 40 , 41 and the contacts 42 , 43 . Input section. The first and second pressure sensors 142' 143 function as a logical "AND" gate for the input circuit of the P-channel MOSFET 244. When the first and second conductive contacts 180, 185, 190, 196 of the first and second pressure sensors 142, 143 are not engaged or when the first and second pressure sensors 142, When the first and second conductive contacts of one of the 143 or the other are engaged, the first and second pressure sensors 142, 143 present an open circuit to the gate of the p_channel MOSFET in the standby mode. . The open circuit biases the p-channel MOSFET 244 to an off state by coupling a supply voltage to the gate of the MOSFET via the bias resistor 246 to -34- (32) (32) 1328684. A user positions the differential measurement probe 10 on the device under test 54 and causes the probe tips 151 to contact the circuit traces 50. The probe tip 151 is coupled to the electrical ground via the armatures and switch contacts 260 and 254 of the control modules 1 2 and 13 and the 50 ohm terminating resistor 66 to discharge the device under test 54. Any ESD and EOS voltage. The pressure applied to the probe tips 151 of the differential measuring probes 1 in contact with a device under test 54 causes movement of the housing 100 relative to the coaxial probe assemblies 140, 141. The movement of the outer casing 100 causes the second conductive contacts 185, 196 of the first and second pressure sensors H2, M3 and the first conductive contacts 180 of the first and second pressure sensors 142, 143 190 contact. The engagement of the first and second conductive contacts 180, 185 and 190, 196 of the first and second pressure sensors 142, 143 electrically couples the ground line to the control modules 1 2 and 1 3 The input circuit of the p-channel MOSFET 244, which produces a voltage divider network that includes the resistors of the bias resistor 246' input resistor 242 and the first or second pressure sensor 142' 143. The traverse has about 7. in the preferred embodiment. The voltage drop of the 7 million ohm high resistance 偏压 bias resistor 246 causes the p-channel MOSFET 2 44 to perform and supplies a current and voltage to the coil of the RF relay 250, which turns off the control module The contacts 2 260 and 252 of 1 2 and 1 3 and the probe tip 154 of the differential measuring probe 10 are coupled to the first and second input channels of the sampling head 18. The RF relays 250 require a current of 30 milliamps of +15 volts to move the armature 260 from -35- (33) 1328684 to the normal open contact 252. The smaller holding current and voltage are supplied to the RF relays 250 of the control modules 12 and 13 by the RC circuit formed by the charging capacitor 247 and the resistor 248. The current outputs of the p-channel MOSFETs are also coupled via resistors 266 and LEDs 34 of the control modules 12 and 13 to provide a path for the probe tips 151 to be coupled to the sampling heads 18. Visual indication of the input portion 〇 • reducing the pressure of the differential measuring probe 1 〇 at the device under test 54 to at least one of the second preload compressive forces generated by the second compressing member 145, 147 The following will disengage at least one set of conductive contacts 180, 185 and 190, 196 of the first and second pressure sensors 142, 143 to cause an activation signal from the differential measuring probe 10 from the control The input circuits of the p-channel MOSFET 244 of the modules 1 2 and 13 are removed. The voltage supply is again supplied to the gates of the p-channel MOSFETs 244 causing the MOSFETs to turn off or remove power supplied to the RF line 圏250#, which in turn will cause the differential measurement probe 10 to The probe tip 151 is coupled to the electrical ground via the 50 ohm terminating resistor 66. Currents from the collapsed magnetic fields of the coils are coupled through the shunt diodes 246. Referring now to Figure 13, there is shown a perspective view of a portion of another embodiment of a differential measuring probe having a retractable dual shock absorbing variable pitch probe tip. Figure 13 is the same as the previous figure. The components are labeled with the same reference numerals. The coaxial probe assembly 140' 141 'the pressure sensor 142 ' 143 and the first and second compression elements 144, 145' 146, 147 are identical to the previous description of -36-(34) 1328684. The outer casing member 102 in this embodiment has substantially continuous projections 131, 270 extending from the side edges of the outer casing member 102. This second protrusion 270 has the same structure as the protrusion 131. The outer surface 271 of the outer casing member 102 has a recess 272' formed therein to receive the cap screw 215. The cap cover 218 is fitted over the recess 272 and secured to the outer casing member 102 by the screw 219. The cap screws 215 are screwed to the carriers 211 and 273. The carrier 273 # has the same structure as the carrier 211. The carrier 273 is positioned in the recess 114 of the channel 107. The carrier 211 houses the holding block 181 of the first coaxial probe assembly and the carrier 273 houses the holding block 191 of the second coaxial probe assembly 141. The rotation of the cap screws 215 independently moves the carriers 21 1 , 272 and then independently moves the probe tips 151 of the coaxial probe assemblies 140, 141 to set the probes The probe spacing between the tips 151. The outer casing member 104 conforms to the size of the outer periphery of the outer casing member 102 by the two projections 131 and 270. ® Refer to Figure 14 for a differential with a retractable dual-damping variable-pitch probe tip to transmit a start signal to an electrical overstress (EOS) and electrostatic discharge (ESD) protection control module 300 Another embodiment of the measurement probe 10 is shown. Elements that are the same as in the previous figures are denoted by the same reference numerals. The first and second control modules 1 2, 13 of the previous embodiment are replaced by a single control module 300 that is disposed in one of the racks 16 of the measurement test instrument 14. . As clearly shown in FIG. 15, the control module 300 has coaxial input terminals 302, 303, coaxial output terminals 304' 305, and a coaxial terminal terminal 306. A conductive input connector 307 is also provided -37-(35) (35)1328684 in the control module 300. An optional visual indicator 308 'such as an LED' is secured to the control module 300 to indicate when the probe tips of the cadaver differential measurement probe 10 are coupled to the sampling head The coaxial input terminals 3〇2 and 3〇3 are coupled to respective ends of the coaxial cables 36 and 37, and the other ends of the coaxial cables are coupled to the measuring probe 10. The output terminals 304 and 305 are coupled to the input terminals of the sampling head 18 via the coaxial cables 24 and 25. The 5" ohmic terminal connector 38 is secured to the coaxial terminal terminal 306. The conductive plug connector 40 is plugged into the input connector 32. The electrical contact 42 of the plug connector 4 is electrically connected to the electrical conductor 44 having a second plug connector 46 at the other end. The second plug connector 46 is plugged into a plug receptacle 48 that is mounted to the differential measuring probe 10. A plug socket 48 on the measuring probe is mounted on the bracket 222, which is secured to the anti-rotation blocks 156, 157 of the differential measuring probe 10. The insulated wire 207 of the differential measuring probe 10 is electrically coupled to the plug receptacle 48. Figure 16 shows a schematic diagram of the control circuit 320 in the control module 300. In Fig. 16, elements identical to those of the previous figures are denoted by the same reference numerals. The control module 300 has the same circuit configuration and function as the control modules 12, 13 except that the rf relay switch 250 has two armature contacts 322 and 324 in place of an armature contact. The control module 300 receives an activation signal from the differential measurement probe 1 via a conductive input connector 32 connected to the electrical contact 42 of the plug connector 40, wherein the electrical contact is connected to The electrical conductor 44. The relay -38- (36) 1328684 switch contacts 326 and 328 are coupled to the signal conductor 3 3 0 of the coaxial terminal terminal 3〇6. Relay switch contacts 3 3 2 and 3 3 4 are coupled to the signal conductors 336 and 338 of the coaxial output terminals 3 04 and 305, respectively. The armature contacts 3 22 and 324 are respectively coupled to the signal conductors 34 and 342 of the coaxial input terminals 3 〇 2 and 303. In operation, when the MOSFET 244 is not conducting, the armature contacts 322 and 324 of the rF relay switch 25 are coupled to the 50 φ ohm termination connector 38 via relay switch contacts 326 and 328. The enable signal causes the MOSFET 244 to conduct and supply a current and voltage to the coil of the RF relay 250. The RF relay closes the contacts 322 and 332 and 324 and 334 of the control module 300 and the differential measuring probe The probe tips ι 51 are coupled to the first and second input channels of the sampling head 18. What has been described in the present invention is an activation signal that is electrically grounded. However, if voltage power is supplied to the measurement probe 1 则, the present invention can also be implemented using a positive or negative voltage enable signal. In this configuration, the first conductive contacts 180 and 190 of the first and second pressure sensors 142 and 143 must be electrically insulated from the semi-rigid coaxial cable 148, and the voltage enable signal is One of the second conductive elements 185 or 196 of the first and second pressure sensors 142, 143 is in contact. Moreover, various different configurations of the first and second compression members 144, 146 and 145' 147 have also been described. Other configurations of the first and second compression elements 144' 146 and 145, 147 may also be attempted using different compression materials, such as elastomers, etc., wherein the first compression element is in the coaxial probe assembly 140, 141 An initial preload and an increased compressive force are generated, and the second compression element generates a second preload compressive force on the coaxial probe total -39-(37) 1328684 to 140, 141, and the coaxial An increased compressive force is added to the probe assemblies 140, 141. It will be appreciated by those skilled in the art that many changes may be made in the details of the above described embodiments of the invention without departing from the principles of the invention. Accordingly, the scope of the invention is defined only by the scope of the following claims. BRIEF DESCRIPTION OF THE DRAWINGS φ Figure 1 is a graphical representation of the force applied to one of the representative probe assemblies. 2 is a perspective view of a differential measuring probe having a retractable dual shock absorbing variable pitch probe tip for transmitting a start signal to an EOS/ESD protection control module in accordance with the present invention. 3 is a perspective view of a first EOS/ESD protection control module coupled to a differential measurement probe having a retractable dual damped variable pitch probe tip for transmitting a start signal in accordance with the present invention. # Figure 4 is a housing for a differential measuring probe having a retractable double damped variable pitch probe tip for transmitting a start signal to a Ο S / ESD protection control module in accordance with the present invention. Decompose the stereo view. 5 is a partial exploded view of a first embodiment of a differential measuring probe having a retractable double damped variable pitch probe tip for transmitting a start signal to an EOS/ESD protection control module in accordance with the present invention. view. 6 is a first of the semi-rigid coaxial cables in a measurement probe having a retractable double-damping variable-pitch probe tip for transmitting a start signal to an EOS/ESD protection control module in accordance with the present invention. Stereo view of the holding block and the curved section -40 - (38) (38) 1328684. 7 is a first and second pressure sensor of a differential measuring probe having a retractable double damped variable pitch probe tip for transmitting a start signal to an EOS/ESD protection control module in accordance with the present invention. A close-up perspective view of the second conductive contact and the second compression element. Figure 8 is a second of the semi-rigid coaxial cable in a measuring probe having a retractable double-shock variable pitch probe tip for transmitting a start signal to an EOS/ESD protection control module in accordance with the present invention. A stereoscopic view of the holding block and the curved portion. 9 is a differential measurement probe having a retractable double damped variable pitch probe tip for transmitting a start signal to an EOS/ESD protection control module according to the present invention, by the first and the A schematic illustration of the respective forces applied by the two compression elements to the coaxial probe assemblies. 9B is a differential measurement probe having a retractable double damped variable pitch probe tip for transmitting a start signal to an E 0 S /ESD protection control module in accordance with the present invention And a schematic diagram of the total force applied by the second compression element to the coaxial probe assemblies. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a perspective view of an assembled differential measuring probe having a retractable double shock absorbing variable pitch probe tip for transmitting an activation signal to an EOS/ESD protection control module in accordance with one embodiment of the present invention. Figure I1 is a probe in a differential measuring probe having a retractable double damped variable pitch probe tip for transmitting a start signal to an E 〇 s /ESD protection control module in accordance with the present invention. Detailed illustration of the tip. Figure 12 is coupled to a reversible double shock absorbing -41 - (39) (39) 1328684 variable pitch probe tip for transmitting an activation signal to an EOS/ESD protection control module in accordance with one of the present invention. A schematic diagram of the control circuitry in the control modules in the differential measurement probes.立体 13 is a perspective view of a portion of another embodiment of a differential measuring probe having a retractable double damped variable pitch probe tip for transmitting a start signal to an EOS/ESD protection control module in accordance with the present invention . W 14 is another embodiment of a differential measuring probe having a retractable double damped variable pitch probe tip for transmitting a start signal to an EOS/ESD protection control module in accordance with the present invention. The ® 15 is coupled to a perspective view of another EOS/ESD protection control module having a differential measuring probe that retracts the double-shock variable pitch probe tip to transmit a start signal in accordance with the present invention. Figure 16 is coupled to a differential measuring probe having a retractable double damped variable pitch probe tip for transmitting a start signal to an E 0 S / ESD protection control module in accordance with the present invention. A schematic diagram of the control circuit in the control module. [Main component symbol description] 1 〇: Variable tip pitch differential measurement probe 1 2 : Control module 1 3 : Control module 14: Digital sampling oscilloscope 16: Rack 1 8 : Sampling head -42- (40) 1328684 22 : Input terminal 23 : Input terminal 24 : Coaxial cable 25 : Coaxial cable 26 : Input terminal 2 8 : Output terminal 3 0 : Terminal terminal φ 32 : Input connector 34 : Optional visual indicator 36 : Cable 37 : Cable 3 8 : Terminal connector 40 : Conductive plug connector 4 1 : Conductive plug connector 4 2 : Electrical contact _ 4 3 : Electrical contact 44 : Electrical conductor 45 : Electrical conductor 46 : Plug connector 47 : plug connector 48 : plug socket 49 : plug socket 50 : circuit trace 52 : circuit board - 43 - ( 41 ) 1328684 5 4 : device under test 1 : housing 102 : housing member 104 : housing member 1 0 6 : channel 107 : channel 1 08 : end φ 1 10 : end 1 1 2 : notch 1 1 3 : notch 1 1 4 : notch 1 1 5 : notch 1 1 6 : rear end wall 1 1 7 : Rear end wall 1 1 8 : Rear end wall # 1 1 9 : Rear end wall 1 20 : Groove 1 2 1 : Lateral passage groove 122 : Parallel groove 1 23 : Parallel groove 1 24 : Longitudinal groove 12 5: channel partition 126: channel partition 127: open recess with face back -44- 1328684 1 1 1 1 1 1 1

1 1 1 1 1 1 1 notch notch groove projection notch hole inner chamber probe assembly probe assembly pressure sensor pressure sensor compression element compression element compression element compression element semi-rigid coaxial cable central signal conductor exterior Shielding conductor probe tip bending part coaxial threaded connector attachment plate opening anti-rotation block -45- 1 1328684 anti-rotation block channel conductive contact retaining block bending groove long straight part long straight part conductive contact groove movable electrical connection Point Conductive Housing Conductive Contact Hold Block Curved Groove Long Straight Section Long Straight Conductive Contact Conductive Element Conductive Element Groove Groove Movable Electrical Contact Movable Electrical Contact 203 : Conductive Housing (44) 1328684 204 : Conductivity Outer casing 2 0 6 : insulated wire 2 0 7 : insulated wire 208 : compression spring 209 : compression spring holding member 210 : adjustment mechanism 21 1 : carrier φ 212 : base 2 1 3 : side wall 2 1 4 : side wall 2 1 5 : Thread cap screw 2 1 6 : Cap head 2 1 7 : Threaded shank 2 1 8 : Cap plate 2 1 9 : Screw φ 220 : Groove 2 2 1 : Partition wall 222 : Bracket 2 2 3 : Electrical contact 2 2 4 : Electrical contact 2 2 5 : Electrical contact 2 2 6 : Electrical contact 2 3 2 : Detection point 2 3 4 : Bevel -47 - (45) 1328684 2 4 Ο : Control circuit 2 4 2 : Resistor 244 : High input impedance mutual conductor 246: Bias resistor 247: Charging capacitor 248: Power supply resistor 2 5 0 : RF relay switch φ 2 5 2 : Contact 2 5 4 : Contact 2 5 6 : Signal conductor 2 5 8 : Signal conductor 2 6 0 : Armature contact 262: signal conductor 2 6 4 : shunt diode 2 6 6 : series resistor # 270 : protrusion 271 : outer surface 272 : notch 3 00 : single control module 302 : input terminal 3 03 : input terminal 3 04 : Output terminal 3 0 5 : Output terminal 3 0 6 : Terminal terminal -48- (46) 1328684 3 07 : Conductive input connector 3 08 : Optional visual indicator 3 2 0 : Control circuit 3 2 2 : Armature contact 3 24 : Armature contact 3 2 6 : Contact 3 2 8 : Contact φ 3 3 0 : Signal conductor 3 3 2 : Contact 3 3 4 : Contact 3 3 6 : Signal conductor 3 3 8: Signal conductor 3 4 0 : Signal conductor 3 4 2 : Signal conductor • -49 -

Claims (1)

1328684 X. Patent application scope. Annex. 5A: Patent application No. 95116084 Chinese patent application scope is replaced by the Republic of China on March 9th, 1999. The differential measurement probe with variable pitch probe tip contains: First and second coaxial probe assemblies, and each coaxial probe assembly #-probe tip; a housing 'which houses the first and second coaxial probe assemblies and enables one and second coaxial probes a probe tip of the needle assembly extending from one end of the housing; a first compressible member disposed in the housing, and one of the compressible members applying a first preload compressive force to the first a probe assembly and a first increased compression force applied by the total axial movement of the housing relative to the first coaxial probe, and the other of the first pressure members applies a first pre- a load compressing force to the second coaxial probe and a first increased compressive force applied by the housing relative to the second coaxial probe assembly; a second compressible member disposed externally In the shell, and one of the compressible elements is applying the first increasing pressure Applying a second preload compressive force to the first coaxial assembly to the first coaxial assembly and applying a first axial movement relative to the first coaxial probe assembly Secondly, the compression force is increased, and the other of the second component elements is applied to the first increased compression force on the second coaxial body, and the package has the first coaxially formed first coaxially formed contraction pin. Applying a second preload compressive force to the second coaxial probe assembly after the probe is inserted into the compression probe 1328684 assembly and applying a further axial movement of the housing relative to the second coaxial probe assembly a second increase in compressive force; first and second pressure sensors disposed in the housing to transmit an axial movement relative to the first and second coaxial probe assemblies An activation signal, and each of the first and second pressure sensors has a first contact associated with each of the respective coaxial probe assemblies and a associated with the housing Second contact; and at least one first adjustment machine Provided in the housing and mechanically coupled to one of the first and second coaxial probe assemblies to change the probes of the first and second coaxial probe assemblies Sharp probe tip spacing. 2. The differential measuring probe of claim 1, wherein each of the first and second coaxial probe assemblies further comprises a half rigid coaxial cable having one at one end of the semi-rigid coaxial cable a probe tip having a threaded connector at the other end, and the probe tip end portion of the semi-rigid coaxial cable has a curved portion that is converted into a straight portion at the probe tip to make the semi-rigid The probe tips of the coaxial cable are angled toward each other at one end of the outer casing and the threaded connectors of each of the semi-rigid coaxial cables extend at the other end of the outer casing. 3. The differential measuring probe of claim 1, wherein the outer casing further comprises first and second members, and at least one member has first and second passages formed therein to receive the first and second a coaxial probe assembly, the first compressible member, the second compressible member, the first and second pressure sensors, and at least the first adjustment mechanism, and the first and second configurations -2- 1328684 The pieces are joined together to form an internal chamber. 4. The differential measuring probe of claim 2, wherein each of the first compressible elements further comprises a first one of the first and second coaxial probe assemblies positioned a compression spring on the semi-rigid coaxial cable, and one end of the compression spring is fixedly positioned to the semi-rigid coaxial cable and the other end is engaged with the outer casing, and the compression spring is compressed on the semi-rigid coaxial cable A fixed position is formed between the housing and the first preload force. 5. The differential measuring probe of claim 2, wherein each of the first and second pressure sensors further comprises a first conductive contact, and the first conductive contacts One of the points is electrically coupled to the outer shield conductor of one of the semi-rigid coaxial cables of the first and second coaxial probe assemblies and the other first conductive contact is associated with the first The outer shield conductor of the other semi-rigid coaxial cable of the second coaxial probe assembly is electrically insulated, and each of the second and second pressure sensors further includes a second contact disposed in the outer casing Second conductive contact. 6. The differential measuring probe of claim 5, wherein the first conductive contact of one of the first and second pressure sensors further comprises a first holding block, the first holding block a probe tip disposed adjacent to one of the semi-rigid coaxial cables of the first and second coaxial probe assemblies, and the first retention block has a first disposed between the opposite straight portions The curved recesses receive the respective curved portions of the semi-rigid coaxial cable, and the first conductive contacts of the other first and second pressure sensors further comprise a first adjacent and electrically insulated one a conductive structure -3- 1328684 of the second holding block, and the second holding block is disposed adjacent to the probe tip of the other semi-rigid coaxial cable of the first and second coaxial probe assemblies, and the first The two retaining blocks have a curved recess disposed between the opposing elongated portions to receive the respective curved portions of the first and second coaxial probe assemblies of the semi-rigid coaxial cable. 7. The differential measuring probe of claim 5, wherein the first conductive contacts of the first and second pressure sensors engage the first and second pressure sensors The first and second pressure sensors generate a logical "AND" function when the second conductive contacts are in contact. 8. The differential measuring probe of claim 7, wherein one of the second conductive contacts of the first and second pressure sensors further comprises a common conductive contact, the common conductive connection The point is used to electrically couple the second conductive contacts together via one of the first conductive contacts of the first and second pressure sensors. 9. The differential measuring probe of claim 8 wherein each of the second compressible elements further comprises a compression spring disposed in a bore of a conductive outer casing, the conductivity The outer casing has a movable electrical contact secured in the aperture, and the compression spring is compressed between the electrically conductive outer casing and the movable electrical contact to produce the second preloading compressive force. 10. The differential measuring probe of claim 9, wherein each of the electrically conductive outer casings that house the compression spring and secure the movable electrical contact further comprises the first and second pressure sensors One of the second conductive contacts. 11. The differential measuring probe of claim 6, wherein the first adjusting mechanism further comprises a thread having a thread therein, and the carrier housing is disposed adjacent to the first and the first One of the first and the first of the probe tips of the semi-rigid coaxial cable and one having a screw head attached to a threaded shank and the screw head is received and captured therein In the outer surface of the outer casing, the threaded shank penetrates through one of the outer casings and engages the threaded hole. #1 2 · In the differential measurement of claim 1 of the patent application, the carrier further comprises a U-shape having a base and a side wall. The holding block is tightly received in the U-shaped member. 13. The differential measurement of claim 11 further comprising a second adjustment mechanism, wherein the second adjustment machine includes a carrier having a threaded hole therein, and the carrier is adjacent to the first And the other of the first and second holding blocks of the probe tips of the semi-rigid cables of the second coaxial probe assembly, a screw attached to the screw head of a threaded shank, and the Threaded and captured in a recess in the outer surface of the outer casing, and the one of the outer casing is bored and engages the threaded hole in the carrier. The difference is as disclosed in claim 13 In the measurement, the carrier further comprises a U-shaped portion having a base and a side wall, the holding block being tightly received in the U-shaped member. 1 5 - differential measurement as in claim 2, each of the first and second coaxial probe assemblies further enclosing a hole in the semi-rigid coaxial cable adjacent to the threaded connector A shaft of the second axial holding portion of the carrier shaft is recessed in the carrier, the probe member, the member thereof, and the probe are further configured to be coaxially disposed and have a head received by the threaded handle The probe, its components, and the needle, including an attached attachment plate-5-1328684, and the attachment plate is secured to an anti-rotation block in which the anti-rotation block is positioned. The differential measuring probe of claim 15 further comprising an electrical conductor coupled to one of the first and second pressure sensors. 1 7 - The differential measuring probe of claim 16 further comprising an electrical connector socket mounted on the differential measuring probe, the differential measuring probe having an electrical A φ electrical contact coupled to the electrical conductor. 18. The differential measuring probe of claim 17, wherein the electrical connector socket is mounted on a bracket having a top plate and an attached side wall, and the bracket is secured to One of the attachment plates. 1 9 - The differential measuring probe of claim 16 further comprising first and second electrical connector sockets mounted on the differential measuring probe, and the electrical connector socket Each has an electrical contact that is electrically coupled to the electrical conductor. Φ 2 0. The differential measuring probe of claim 19, wherein the first and second electrical connector sockets are mounted on a bracket having a top plate and an auxiliary side wall, and The bracket is secured to one of the attachment plates. 2 1 . A differential measuring probe having a variable pitch probe tip coupled to at least one first electrical overstress and electrostatic discharge protection module via first and second coaxial cables and The differential measuring probe transmits a start signal to the electrical overstress and electrostatic discharge protection control module to couple the difference -6 - 1328684 fractional measurement probe to the input circuit of the measurement test instrument, including: And a second coaxial probe assembly each having a coaxial probe assembly formed of a semi-rigid coaxial cable having a probe tip at one end of the semi-rigid coaxial cable and a threaded connector at the other end, and The threaded connector is coupled to the coaxial cable, and the probe tip portion of the semi-rigid coaxial cable has a curved portion that is converted into a straight portion at the probe tip to make the semi-rigid The probe tips of the coaxial cable are angled toward each other; an outer casing having an inner chamber extending from the outer length of the outer casing and exposed at opposite ends of the outer casing, and the first and second coaxial Probe Provided in the internal chamber such that the probe tips of the first and second coaxial probe assemblies extend from one end of the housing, and the first and second coaxial probe assemblies are assembled a threaded connector extending from the other end of the housing » a first compressible member disposed in the housing, and one of the first compressible members applying a first preloading compressive force to the first a coaxial probe assembly and a first increased compressive force applied by axial movement of the housing relative to the first coaxial probe assembly, and the other of the first compressible members applies a first a preloading compressive force to the second coaxial probe assembly and a first increased compressive force applied by axial movement of the outer casing relative to the second coaxial probe assembly; and a second compressible element, Provided in the housing, and one of the second compressible elements applies a second preloading compressive force to the first coaxial after applying the first increased compressive force to the first coaxial probe assembly Probe 1328684 assembly and one by the outer casing relative to The second coaxial probe assembly is further axially moved to apply a second increased compressive force, and the other of the second compressible members is applying the first increased compressive force to the second coaxial probe Applying a second preloading compressive force to the second coaxial probe assembly and a second increased compressive force applied by the housing for further axial movement relative to the second coaxial probe assembly; And a second pressure sensor transmitting an activation signal corresponding to axial movement of the housing relative to the first and second coaxial probe assemblies, and the first and second pressure sensors Each having a first conductive contact, and one of the first conductive contacts is electrically coupled to one of the semi-rigid coaxial cables of the first and second coaxial probe assemblies The outer shield conductor and the other first conductive contact are electrically insulated from the outer shield conductor of the other semi-rigid coaxial cable of the first and second coaxial probe assemblies, and a first one disposed in the outer casing Two conductive contacts, and the first and second pressure sensing One of the second contacts is coupled to the electrical overstress and ESD protection control module via an electrical conductor; at least a first adjustment mechanism disposed in the housing and mechanically Coupling to one of the first and second coaxial probe assemblies to change the probe tips of the probe tips of the semi-rigid coaxial cables of the first and second coaxial probe assemblies The first and second coaxial probes before the first conductive contacts of the first and second pressure sensors engage the second conductive contacts of the first and second pressure sensors The probe tips of the needle assembly are coupled to the electrical grounding wire via the electrical overstress and electrostatic discharge protection control module, and when the electrical-8-1328684 overstress and electrostatic discharge protection control module Receiving the activation signal corresponding to the first conductive contacts of the first and second pressure sensors engaging the second conductive contacts of the first and second pressure sensors, The probe tips are coupled to the input circuit of the measurement test instrument. 22. The differential measuring probe of claim 21, wherein the outer casing further comprises first and second members, and at least one member has first and second passages formed therein for receiving the first and second a coaxial probe φ assembly, the first compressible member, the second compressible member, the first and second pressure sensors, and at least the first adjustment mechanism, and the first and second members are combined Together to form the internal chamber. 23. The differential measuring probe of claim 21, wherein each of the first compressible elements further comprises a first one of the first and second coaxial probe assemblies positioned a compression spring on the semi-rigid coaxial cable, and one end of the compression spring is fixedly positioned to the semi-rigid coaxial cable and the other end is engaged with the outer casing, and the compression spring is pressed against the semi-rigid coaxial cable The fixed position on the upper portion is coupled to the outer casing to generate the first preload compressive force. 24. The differential measuring probe of claim 21, wherein the first conductive contact of one of the first and second pressure sensors further comprises a first holding block, the first holding a block is disposed adjacent to a probe tip of one of the semi-rigid coaxial cables of the first and second coaxial probe assemblies, and the first retaining block has a longitudinal portion disposed opposite each other a curved groove therebetween to receive the respective curved portions of the semi-rigid coaxial cable, and the first conductive contacts of the other first and second pressure sensors are further arranged in a step -9 - 1328684 And electrically insulated from the conductive member of the second holding block, and the second holding block is disposed adjacent to the probe tip of the other semi-rigid coaxial cable of the first and second coaxial probe assemblies, and the The second retaining block has a curved recess disposed between the opposing elongated portions to receive the respective curved portions of the first and second coaxial probe assemblies of the semi-rigid coaxial cable. 25. The differential measuring probe of claim 21, wherein the first conductive contacts of the first and second pressure sensors engage the first and second pressure sensors The first and second pressure sensors generate a logical "AND" function when the second conductive contacts are equal. 26. The differential measuring probe of claim 25, wherein one of the second conductive contacts of the first and second pressure sensors further comprises a common conductive contact, the common conductive connection The point is used to electrically couple the second conductive contacts together via one of the first conductive contacts of the first and second pressure sensors. 27. The differential measuring probe of claim 26, wherein each of the second compressible elements further comprises a compression spring disposed in a bore of a conductive outer casing, the conductivity The outer casing has a movable electrical contact secured in the hole, and the compression spring is compressed between the conductive outer casing and the movable electrical contact to generate the second preload compression force 〇28. The differential measuring probe of item 27, wherein each of the electrically conductive outer casings that house the compression spring and secure the movable electrical contact further comprises the second of the first and second pressure sensors -10 - 1328684 One of the conductive contacts. 29. The differential measuring probe of claim 24, wherein the first adjustment mechanism further comprises a carrier having a threaded hole therein and the carrier is disposed adjacent to the first and the first One of the first and second holding blocks of the probe tips of the semi-rigid coaxial cable of the two-coaxial probe assembly and a screw having a screw head attached to a threaded shank and A screw head is received and captured in a recess in the outer surface of the outer casing and the threaded shank extends through one of the outer casings and engages the threaded bore in the carrier. 3. The differential measuring probe of claim 29, wherein the carrier further comprises a U-shaped member having a base and a side wall, and the holding block is tightly received in the U-shaped member. The differential measuring probe of claim 29, further comprising a second adjusting mechanism, wherein the second adjusting mechanism further comprises a carrier having a threaded hole therein, and the carrier is received The other of the first and second holding blocks of the probe tips of the semi-rigid coaxial cables disposed adjacent to the first and second coaxial probe assemblies, and one having an attached to one a screw of a screw head of the shank, and the screw head is received and captured in a recess of the outer surface of the outer casing, and the threaded shank penetrates through one of the outer casings and engages the carrier Threaded hole. 32. The differential measuring probe of claim 31, wherein the carrier further comprises a U-shaped member having a base and a side wall, and the holding block is tightly received in the U-shaped member. 3 3 · The differential measuring probe of claim 21, wherein each of the first and second coaxial probe assemblies of -11 - 1328684 further comprises a first disposed adjacent to the thread An attachment plate on the semi-rigid coaxial cable of the connector, and the attachment plate is secured to an anti-rotation block, the anti-rotation block being positioned in the housing. 34. The differential measuring probe of claim 33, wherein the electrical conductor further comprises first and second insulated wire portions, and the first insulated wire portion is electrically coupled to the first and second pressure portions One of the second conductive contacts of the sensor is connected to an electrical contact of one of the electrical connector sockets of the differential measuring probe, and the second insulated wire is electrically coupled to the first An electrical contact of the first electrical plug to an electrical contact of a second electrical plug, and the first electrical plug is mated with an electrical connector socket mounted on the differential measuring probe, and the second electrical plug Cooperating with an electrical connector socket having an electrical contact mounted in the electrical overstress and ESD protection control module. 35. The differential measuring probe of claim 34, wherein the electrical connector receptacle is mounted on a bracket having a top plate and an associated side wall, and the bracket is secured to the bracket One of the attached plates. 36. The differential measuring probe of claim 3, wherein the first coaxial cable couples the differential measuring probe to a first electrical overstress and electrostatic discharge protection control module and the first The two-coaxial cable couples the differential measuring probe to a second electrical overstress and electrostatic discharge protection control module, and the differential measuring probe transmits the starting signal to the first and second electrical overstresses And an electrostatic discharge protection control module, wherein the electrical conductor further comprises a first insulated wire portion electrically coupled to the first and second pressure sensors 12- 1328684 One of the conductive contacts to the respective electrical contacts of the first and second electrical connector sockets mounted on the differential measuring probe and having second and third insulated wire portions, and the second and Each of the second insulated wire portions has first and second electrical plugs, and the first and second electrical plugs each have an electrical contact, and the electrical contact of the first electrical plug of the second insulated wire And the first electricity that is mounted on the differential measuring probe The electrical contacts of the connector socket are matched, and the electrical contacts of the second φ electric plug of the second insulated wire are connected to one of the first electrical overstress and the electrostatic discharge protection control module. The electrical contacts of the electrical connector socket are matched and the electrical contact of the electrical plug of the second insulated wire is matched with the electrical contact of the second electrical connector socket mounted on the differential measuring probe. And the electrical contact of the second electrical plug of the third insulated wire is matched with an electrical contact mounted on one of the second electrical overstress and the electrostatic discharge protection module. 3 7. The differential measuring probe of claim 36, wherein the first and second electrical connector sockets are mounted on a bracket having a top plate and an auxiliary side wall. And the bracket is secured to one of the attachment plates. -13-